I have to believe in a world outside my own mind. I have to believe that my actions still have meaning. Even if I can't remember them. I have to believe that when my eyes are closed, the world's still here. Do I believe the world's still here? Is it still out there? Yeah. We all need memories to remind ourselves who we are. I'm no different. Now, where was I? (Guy Pearce as Leonard Shelby in Memento, dir. Christopher Nolan, 2000)